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Posted to issues@commons.apache.org by "contextshuffling (Jira)" <ji...@apache.org> on 2019/11/22 16:16:00 UTC
[jira] [Created] (LANG-1500) Test may fail due to a different order
of fields returned by reflection api
contextshuffling created LANG-1500:
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Summary: Test may fail due to a different order of fields returned by reflection api
Key: LANG-1500
URL: https://issues.apache.org/jira/browse/LANG-1500
Project: Commons Lang
Issue Type: Bug
Components: lang.builder.*
Affects Versions: 3.8.1, 3.9, 3.8
Reporter: contextshuffling
Tests in ` HashCodeBuilderTest ` depends on `HashCodeBuilder.reflectionHashCode`. The logic of `reflectionHashCode` appends the fields returned by `java.lang.Class.getDeclaredFields`. The order of fields being appended will affect the calculated HashCode.
However, `java.lang.Class.getDeclaredFields` does not guarantee any specific order and thus, test can fail if the order is different, (i.e., it generates a different hash code). "The elements in the returned array are not sorted and are not in any particular order" (reference: [https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html#getDeclaredMethods--)|https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html#getDeclaredMethods--]
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